Is there any guideline on acceptable volumetric shrinkage for Inventor Tooling?

[ericjed13]

Say, if i have 8 percent, is that acceptable? or should i redesign???

[MingweiGao]

I think the answer is "NO". Because of the shrinkage value(s) is related to the specific material and the structure of your model, so there are some recommended values based on materials and the accurately shrinkage depends on your specific design and experience.